VIKTOR SYKORA / SCIENCE PHOTO LIBRARY VIKTOR SYKORA / SCIENCE PHOTO LIBRARY
Lichen. Coloured scanning electron micrograph (SEM) showing the structure of a lichen. Lichens are the result of a symbiotic relationship between a fungus and an alga. This partnership is able to withstand conditions of drought and extremes of temperature that would be fatal to either constituent organism on its own. Magnification: x125 when printed 10 cm wide.
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